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Cod sursa(job #290283)
#include <stdio.h>
#define dim 100100
#define logdim 17
int n, m, v[dim], a[dim][logdim], lg[dim];
int main()
{
int i, j, k, p;
freopen("rmq.in", "r", stdin);
freopen("rmq.out", "w", stdout);
scanf("%d %d\n", &n, &m);
for (i=1; i<=n; i++) scanf("%d\n", &v[i]);
for (i=1; i<=n; i++) a[i][0]=v[i];
for (j=1; (1<<j)<=n; j++)
for (i=1; i+(1<<j)-1<=n; i++)
{
k=1<<(j-1);
if (a[i][j-1]<a[i+k][j-1])
a[i][j]=a[i][j-1];
else
a[i][j]=a[i+k][j-1];
}
lg[1]=0;
for (i=2; i<=n; i++) lg[i]=lg[i/2]+1;
for (; m; m--)
{
scanf("%d %d\n", &i, &j);
k=lg[j-i+1];
if (a[i][k]<a[j-(1<<k)+1][k])
p=a[i][k];
else
p=a[j-(1<<k)+1][k];
printf("%d\n", p);
}
return 0;
}